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- // Hack it and have it ;) //
- /*author* Priyanshu Shrivastav (from IIT Palakkad) *
- * *_ __ ___ _ ______ ___ _ ____ ___ ___| |_ *
- * | '_ ` _ \| '__/ __/ _ \| '_ \ \ / / |/ __| __| *
- * | | | | | | | | (_| (_) | | | \ V /| | (__| |_ *
- * |_| |_| |_|_|(_)___\___/|_| |_|\_/ |_|\___|\__| *
- When I wrote this, only God and I understood what I was doing
- ** * * * * * * * Now, only God knows!* * * * * * */
- #include <bits/stdc++.h> /*{{{*/
- #include <ext/pb_ds/assoc_container.hpp>
- #include <ext/pb_ds/tree_policy.hpp>
- using namespace std;
- using namespace __gnu_pbds;
- #ifndef CONVICTION
- #pragma GCC optimize ("Ofast")
- #pragma GCC optimize ("unroll-loops")
- #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
- #endif
- #define IOS ios_base::sync_with_stdio(false); cin.tie (nullptr)
- #define PREC cout.precision (10); cout << fixed
- #define X first
- #define Y second
- #define sz(x) (int)x.size()
- #define fr(i,x,y) for (int i = (int)x; i <= (int)y; ++i)
- #define rv(i,x,y) for (int i = (int)x; i >= (int)y; --i)
- #define cnt(x) __builtin_popcount(x)
- #define cntll(x) __builtin_popcountll(x)
- #define bg(x) " [ " << #x << " : " << (x) << " ] "
- #define un(x) sort(x.begin(), x.end()), \
- x.erase(unique(x.begin(), x.end()), x.end())
- using ll = long long;
- using ull = unsigned long long;
- using ff = long double;
- using pii = pair<int,int>;
- using pil = pair<int,ll>;
- using pll = pair<ll,ll>;
- using vi = vector <int>;
- using vl = vector<ll>;
- using vvi = vector <vi>;
- using vvl = vector <vl>;
- using vp = vector <pii>;
- using vvp = vector <vp>;
- typedef tree
- < int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update>
- ordered_set;
- struct chash {
- int operator () (pii x) const { return x.X*31 + x.Y; }
- };
- gp_hash_table <pii, int, chash> gmp;
- #if __cplusplus > 201103L
- seed_seq seq{
- (uint64_t) chrono::duration_cast<chrono::nanoseconds>
- (chrono::high_resolution_clock::now().time_since_epoch()).count(),
- (uint64_t) __builtin_ia32_rdtsc(),
- (uint64_t) (uintptr_t) make_unique<char>().get()
- };
- mt19937 rng(seq); //uniform_int_distribution<int> (l, h)(rng); //[low, high]
- #else
- auto seed = chrono::high_resolution_clock::now().time_since_epoch().count();
- mt19937 rng(seed);
- #endif
- #define debug(args...) { \
- /* WARNING : do NOT compile this debug func calls with following flags: // \
- * // -D_GLIBCXX_DEBUG -D_GLIBCXX_DEBUG_PEDANTIC -D_FORTIFY_SOURCE=2*/ \
- string _s = #args; replace(_s.begin(), _s.end(), ',', ' ');\
- stringstream _ss(_s); \
- istream_iterator<string> _it(_ss); err(_it, args); \
- }
- void err(istream_iterator<string> it) {
- it->empty(); cerr << " (Line : " << __LINE__ << ")" << '\n';
- }
- template<typename T, typename... Args>
- void err(istream_iterator<string> it, T a, Args... args) {
- cerr << fixed << setprecision(15)
- << " [ " << *it << " : " << a << " ] "<< ' ';
- err(++it, args...);
- }
- // __ __
- // (**) (**)
- // IIII IIII
- // #### ####
- // HHHH Madness comes, and madness goes HHHH
- // HHHH An insane place, with insane moves HHHH
- // #### Battles without, for battles within ####
- // ___IIII___ Where evil lives, ___IIII___
- // .-`_._"**"_._`-. and evil rules .-`_._"**"_._`-.
- // |/`` .`\/`. ``\| Breaking them up, |/`` .`\/`. ``\|
- // ` } { ' just breaking them in ` } { '
- // ) () ( Quickest way out, quickest way wins ) () (
- // ( :: ) Never disclose, never betray ( :: )
- // | :: | Cease to speak or cease to breath | :: |
- // | )( | And when you kill a man, | )( |
- // | || | you're a murderer | || |
- // | || | Kill many | || |
- // | || | and you're a conqueror | || |
- // | || | Kill them all ... Ooh.. | || |
- // | || | Oh you're a God! | || |
- // ( () ) -Megadeth ( () )
- // \ / \ /
- // \/ \/
- /*}}}*/
- /*****************************************************************************/
- //Don’t practice until you get it right. Practice until you can’t get it wrong
- vector <int> pref_func (string &s) { // O(|s|)
- int n = (int)s.size();
- vector <int> pi(n);
- pi[0] = 0;
- int sz = (int)s.size();
- for (int i = 1; i < sz; ++i) {
- int len_j = pi[i-1];
- int j = len_j - 1;
- while (len_j > 0 && s[j + 1] != s[i]) {
- len_j = pi[j];
- j = len_j - 1;
- }
- if (s[len_j] == s[i])
- ++len_j;
- pi[i] = len_j;
- }
- return pi;
- }
- // each state represents prefix length
- // transition : length * char -> length
- vector <vector <int>> calc_fsm(string t) { // O(|s| * 26)
- int n = (int)t.size();
- t += '#';
- vector <vector <int>> fsm(n + 1, vector <int> (26));
- vector <int> pi = pref_func(t);
- for (int len = 0; len <= n; ++len) {
- for (int ch = 0; ch < 26; ++ch) {
- if (len == 0 || t[len] == char('a' + ch))
- fsm[len][ch] = len + (t[len] == char('a' + ch));
- else
- fsm[len][ch] = fsm[pi[len - 1]][ch];
- }
- }
- return fsm;
- }
- signed main() {
- IOS; PREC;
- string s, t;
- cin >> s >> t;
- vector<vector<int>> fsm = calc_fsm(t);
- int n = (int)s.size(), m = (int)t.size();
- int dp[m + 1][2];
- memset(dp, -1, sizeof(dp));
- dp[0][0] = 0;
- int nxt;
- for (int i = 0; i < n; ++i) {
- for (int j = 0; j <= m; ++j) if (dp[j][i & 1] != -1) {
- if (s[i] == '?') {
- for (int ch = 0; ch < 26; ++ch) {
- nxt = fsm[j][ch];
- dp[nxt][!(i & 1)] = max(dp[nxt][!(i & 1)], dp[j][i & 1] + (nxt == m));
- }
- }
- else {
- nxt = fsm[j][s[i] - 'a'];
- dp[nxt][!(i & 1)] = max(dp[nxt][!(i & 1)], dp[j][i & 1] + (nxt == m));
- }
- }
- }
- int res = 0;
- for (int i = 0; i <= m; ++i) res = max(res, dp[i][n & 1]);
- cout << res << '\n';
- return EXIT_SUCCESS;
- }
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